Numerous fixes and cleanup

• Explicit Vault address (0.0.0.0 is not good for HA mode)
• Update listener template (thanks @groggemans)
• Add vault_consul_path in consul storage template (thanks @groggemans)
• Fix BSD init task and remove unused grouping (thanks @groggemans)
• Update defaults order (thanks @groggemans)
• Make vault user management configurable (thanks @groggemans)
• Add UI switch (enterprise) and fix tls_disable (thanks @groggemans)
• Remove no longer used 'primary_node' variable (thanks @groggemans)
• Add missing README entries (thanks @groggemans)